Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate
Interactions of dissolved organic matter (DOM) from landfill leachate with clays could affect significantly the fate of hydrophobic organic compounds (HOCs) in soils. The complexes of montmorillonite (MT) and kaolinite (KL) with DOM extracted from landfill leachate were prepared under controlled con...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/734610 |
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| author | Pingxiao Wu Yong Wen Yun Xiang Jianbing Zhou Jianwei Du Nengwu Zhu Ping Li |
| author_facet | Pingxiao Wu Yong Wen Yun Xiang Jianbing Zhou Jianwei Du Nengwu Zhu Ping Li |
| author_sort | Pingxiao Wu |
| collection | DOAJ |
| description | Interactions of dissolved organic matter (DOM) from landfill leachate with clays could affect significantly the fate of hydrophobic organic compounds (HOCs) in soils. The complexes of montmorillonite (MT) and kaolinite (KL) with DOM extracted from landfill leachate were prepared under controlled conditions, termed CMT and CKL, respectively. The bare clays and their complexes were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Batch experiments were designed to investigate the sorption behavior of pyrene onto the clays in the presence of DOM. The maximum sorption capacities of pyrene on MT, CMT, KL, and CKL were 22.18, 38.96, 42.00, and 44.99 μg·g−1, respectively, at the initial concentration of 1000 ± 150 μg·L−1. The sorption isotherms of pyrene by the bare clays followed the Henry model well, whereas the Freundlich sorption isotherm provided a better fit to the equilibrium data of the sorption by the complexes. The role of montmorillonite and kaolinite complexes with DOM in the retention of pyrene in soils was different. This may be due to the different crystal structures between montmorillonite and kaolinite. |
| format | Article |
| id | doaj-art-2947baba9b9243c1a25a9670bd0b3387 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Journal of Chemistry |
| spelling | doaj-art-2947baba9b9243c1a25a9670bd0b33872025-02-03T06:11:16ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/734610734610Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill LeachatePingxiao Wu0Yong Wen1Yun Xiang2Jianbing Zhou3Jianwei Du4Nengwu Zhu5Ping Li6College of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaSouth China Institute of Environmental Sciences of the Ministry of Environmental Protection, Guangzhou 510655, ChinaSouth China Institute of Environmental Sciences of the Ministry of Environmental Protection, Guangzhou 510655, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaSouth China Institute of Environmental Sciences of the Ministry of Environmental Protection, Guangzhou 510655, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaCollege of Environment and Energy, South China University of Technology, Guangzhou 510006, ChinaInteractions of dissolved organic matter (DOM) from landfill leachate with clays could affect significantly the fate of hydrophobic organic compounds (HOCs) in soils. The complexes of montmorillonite (MT) and kaolinite (KL) with DOM extracted from landfill leachate were prepared under controlled conditions, termed CMT and CKL, respectively. The bare clays and their complexes were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Batch experiments were designed to investigate the sorption behavior of pyrene onto the clays in the presence of DOM. The maximum sorption capacities of pyrene on MT, CMT, KL, and CKL were 22.18, 38.96, 42.00, and 44.99 μg·g−1, respectively, at the initial concentration of 1000 ± 150 μg·L−1. The sorption isotherms of pyrene by the bare clays followed the Henry model well, whereas the Freundlich sorption isotherm provided a better fit to the equilibrium data of the sorption by the complexes. The role of montmorillonite and kaolinite complexes with DOM in the retention of pyrene in soils was different. This may be due to the different crystal structures between montmorillonite and kaolinite.http://dx.doi.org/10.1155/2015/734610 |
| spellingShingle | Pingxiao Wu Yong Wen Yun Xiang Jianbing Zhou Jianwei Du Nengwu Zhu Ping Li Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate Journal of Chemistry |
| title | Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate |
| title_full | Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate |
| title_fullStr | Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate |
| title_full_unstemmed | Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate |
| title_short | Sorption of Pyrene by Clay Minerals Coated with Dissolved Organic Matter (DOM) from Landfill Leachate |
| title_sort | sorption of pyrene by clay minerals coated with dissolved organic matter dom from landfill leachate |
| url | http://dx.doi.org/10.1155/2015/734610 |
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